Quadratic finite elements with non-matching grids for the unilateral boundary contact
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 47 (2013) no. 4, pp. 1185-1205.

We analyze a numerical model for the Signorini unilateral contact, based on the mortar method, in the quadratic finite element context. The mortar frame enables one to use non-matching grids and brings facilities in the mesh generation of different components of a complex system. The convergence rates we state here are similar to those already obtained for the Signorini problem when discretized on conforming meshes. The matching for the unilateral contact driven by mortars preserves then the proper accuracy of the quadratic finite elements. This approach has already been used and proved to be reliable for the unilateral contact problems even for large deformations. We provide however some numerical examples to support the theoretical predictions.

DOI: 10.1051/m2an/2012064
Classification: 35J85, 65N30, 74M15
Keywords: unilateral contact conditions, quadratic finite elements, non-matching grids, mortar matching
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Auliac, S.; Belhachmi, Z.; Ben Belgacem, F.; Hecht, F. Quadratic finite elements with non-matching grids for the unilateral boundary contact. ESAIM: Mathematical Modelling and Numerical Analysis , Volume 47 (2013) no. 4, pp. 1185-1205. doi : 10.1051/m2an/2012064. http://www.numdam.org/articles/10.1051/m2an/2012064/

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